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Copy pathdb.go
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98 lines (86 loc) · 2.42 KB
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/*
Copyright © 2024 Acronis International GmbH.
Released under MIT license.
*/
package dbkit
import (
"context"
"database/sql"
"fmt"
"time"
"github.com/acronis/go-appkit/retry"
)
// Open opens a new database connection using the provided configuration.
// If ping is true, it will check the connection by sending a ping to the database.
func Open(cfg *Config, ping bool) (*sql.DB, error) {
driver, dsn := cfg.DriverNameAndDSN()
db, err := sql.Open(driver, dsn)
if err != nil {
return nil, err
}
return db, InitOpenedDB(db, cfg, ping)
}
// InitOpenedDB initializes early opened *sql.DB instance.
func InitOpenedDB(db *sql.DB, cfg *Config, ping bool) error {
db.SetMaxOpenConns(cfg.MaxOpenConns)
db.SetMaxIdleConns(cfg.MaxIdleConns)
db.SetConnMaxLifetime(time.Duration(cfg.ConnMaxLifetime))
if ping {
if err := db.Ping(); err != nil {
return err
}
}
return nil
}
type doInTxOptions struct {
txOpts *sql.TxOptions
retryPolicy retry.Policy
}
// DoInTxOption is a functional option for DoInTx.
type DoInTxOption func(*doInTxOptions)
// WithTxOptions sets transaction options for DoInTx.
func WithTxOptions(txOpts *sql.TxOptions) DoInTxOption {
return func(opts *doInTxOptions) {
opts.txOpts = txOpts
}
}
// WithRetryPolicy sets retry policy for DoInTx.
func WithRetryPolicy(policy retry.Policy) DoInTxOption {
return func(opts *doInTxOptions) {
opts.retryPolicy = policy
}
}
// DoInTx begins a new transaction, calls passed function and do commit or rollback
// depending on whether the function returns an error or not.
func DoInTx(ctx context.Context, dbConn *sql.DB, fn func(tx *sql.Tx) error, options ...DoInTxOption) (err error) {
var opts doInTxOptions
for _, opt := range options {
opt(&opts)
}
if opts.retryPolicy == nil {
return doInTx(ctx, dbConn, fn, opts.txOpts)
}
return retry.DoWithRetry(ctx, opts.retryPolicy, GetIsRetryable(dbConn.Driver()), nil, func(ctx context.Context) error {
return doInTx(ctx, dbConn, fn, opts.txOpts)
})
}
func doInTx(ctx context.Context, dbConn *sql.DB, fn func(tx *sql.Tx) error, txOpts *sql.TxOptions) (err error) {
var tx *sql.Tx
if tx, err = dbConn.BeginTx(ctx, txOpts); err != nil {
return fmt.Errorf("begin tx: %w", err)
}
defer func() {
if p := recover(); p != nil {
_ = tx.Rollback()
panic(p)
}
if err != nil {
_ = tx.Rollback()
return
}
if err = tx.Commit(); err != nil {
err = fmt.Errorf("commit tx: %w", err)
}
}()
return fn(tx)
}